| Abbreviation | Definition |
|---|---|
| s.o.s.,siop.sit | si opus sit - if there is a need |
| SAM | Smart Approaches to Marijuana |
| SC,subc,subcut,subq,SQ | subcutaneous |
| sig | write on label |
| SigA | secretory immunoglobulin A |
| SL | Sub-Lingually (under the tongue) |
| SMPV | smallpox vaccine |
| SMX | sulfamethoxazole |
| sol | solutio - solution |
| SPAP | State Prescription Assistance Program |
| SPGL | Skanska Pharmaceutical Group Limited |
| Sph. | sphere / spherical |
| sph. | sphere, a lens measurement |
| SPMP | State Prescription Monitoring Program |
| SPUDS | Safe Prescription Use Disposal and Storage |
| SR | Slow Release |
| ss | semis - one half or sliding scale |
| SSI,SSRI | sliding scale insulin or sliding scale regularinsulin |
| SSP | Serious Shortage Protocol |
| SSPB | Summary of Safety and Probable Benefit |